Where do unfavourable postures occur?
Examples are: • Work overhead. • Work in constrained positions. • Work in confined rooms. • Work in extremely bent, twisted or extended postures. • Work in a continuously inclined posture (e.g. construction work, concrete reinforcement work). • Work out of reach. • Work in a kneeling, lying, crouching or squatting position . Why are unfavourable postures harmful? The keeping up of a certain body posture demands high muscle force; acute overload and/or fatigue of muscles can, therefore, be the result. Examples are: • Construction work far from the body demands high activation of musculature for holding the arms. • Twisted or extended body postures demand high muscular strain and tension of trunk muscles. During unfavourable body postures, high forces occur also in the skeletal system. This may lead to acute overloading and damage of skeletal structures. For long-lasting activities with an inclined trunk, degenerative disorders, especially in the lumbar region, can arise if such work is
